CONTENTS. 

 Ho. Page- 



VIII. Extracts of a Letter from William Dunbar Esq. of the 

 Natchez, to the President of the Society ; relating to fossil 

 Bones found in Louisiana, and to Lunar Rainbows observed 

 West of the Mississippi. 40 



IX. Meteorological Observations, made by William Dunbar 

 Esq. at the Forest 4 Miles West of the Mississippi, in Lat. 

 31°. 28'. N. and Long. 91°. 30'. W. of Greenwich, 



for the Year 1 800 — with Remarks on the State of the Wea- 

 ther, Vegetation, 8(c. calculated to give some Idea of the 

 Climate of that Country. 43 



X. Abstract of a Communication from Mr. Martin Duralde, 

 relative to fossil Bones $Y. found in the Country of Apelou- 

 sas, West of the Mississippi — to William Dunbar Esq. of 



the Natchez, and by him transmitted to the Society. 55 



XI. Observations made on a Lunar Eclipse, at the Observato- 

 ry i?i the City of Philadelphia, on the 1 1st of Septemer 

 1801; by R. Patterson and A. Ellicott. 59 



XII. On the Hybernation of Swalloivs; by the late Colonel 

 Antes. Communicated by Dr. Barton. 59 



XIII. Astronomical Observations made at Lancaster; Penn- 

 sylvania, chiefly with a View -to ascertain t/ie Longitude of 

 that Borough, and as a Test of the Accuracy with which the 

 Longitude may be found by Lunar Observation; in a Letter' 

 from A. Ellicott to R. Patterson. 61 



XIV. Notices of the Natural History of the northerly Parts of 

 Louisiana; in a Letter from Dr. John Watkins to Dr. Barton. 69 



XV. On two Species of Sphex, inhabiting Virginia and Penn- 

 sylvania, and. probably extending through the Umted States. 



By Benjamin H. Lat robe. 73 



XVI. Memorandum of a new Vegetable Muscipula. By 

 Dr. Barton. 19 



